Program
The mangroves at Bobbin Head provide an interesting case study for students to investigate the relationships between the abiotic and biotic factors in an intertidal ecosystem.
During the day, they will investigate adaptations, abundance and distribution, how species interact and human impacts and management.
Special Note
This program requires a low tide day to enable the students to study the crabs. Please ask our staff when you are making a booking.
Learning intentions
Students are learning about:
- how adaptations increase the organism’s ability to survive
- the effect one species can have on the other species in a community
- how human activity can impact on an ecosystem
Key information
Learning activities
Pre-excursion work
Students are expected to complete pre-visit work to ensure they are able to complete the fieldwork.
Human impacts and management
Students will assess Bobbin Head visually and using maps to determine what human activities may impact the mangroves at Bobbin Head.
Using images, they will describe how this area has changed over time and how these changes may have impacted mangroves.
Abiotic features of mangroves
Students will use scientific equipment to measure the abiotic features of the mangroves to consider the potential impacts of forecast climatic changes on the mangrove ecosystem.
Adaptations
Students will observe and record the physiological, behavioural and structural features of a species of crab that lives in the mangroves to identify and explain different adaptations.
They will also observe, identify and record the differences and adaptations of the two species of mangroves located at Bobbin Head.
Crab distribution
Following the Working Scientifically process, students will observe, hypothesise, plan and conduct an investigation for determining the abundance and distribution of crabs across the internal zone.
Vegetation distribution
Following the Working Scientifically process, students will collect, record and analyse data to determine how salinity affects the distribution of vegetation in the intertidal zone.
Post-excursion work - organism interactions
Students will use observations from their excursion to identify the various species that live in the mangrove ecosystem and using food webs and other sources, identify some of the key relationships (predation, competition and symbiosis) and predict consequences for populations of these biotic factors.
Depth study
Students are invited to use this to develop a depth study on an aspect of mangroves. The Mangrove Resource Hub support website provides further information.
Suggested timetable
| Time | Class A, B | Class C, D |
| 10.00am |
Acknowledgement of Country, Welcome Human impacts and management |
|
| 10.30am | Morning Tea | |
| 10.50am | Abiotic features | Adaptations |
| 11.30am | Adaptations | Abiotic features |
| 12.10pm | Crab distribution | Vegetation distribution |
| 12.50pm | Vegetation distribution | Crab distribution |
| 1.30pm | Lunch | |
| 2.00pm | Conclusion and depart | |
* Please call the centre if you have more than 4 classes
Syllabus outcomes
Biology Stage 6 Syllabus (2017)
Outcomes
- BIO11/12-1 develops and evaluates questions and hypotheses for scientific investigation
- BIO11/12-2 designs and evaluates investigations in order to obtain primary and secondary data and information
- BIO11/12-3 conducts investigations to collect valid and reliable primary and secondary data and information
- BIO11/12-4 selects and processes appropriate qualitative and quantitative data and information using a range of appropriate media
- BIO11/12-5 analyses and evaluates primary and secondary data and information
- BIO11-10 describes biological diversity by explaining the relationships between a range of organisms in terms of specialisation for selected habitats and evolution of species
- BIO11-11 analyses ecosystem dynamics and the interrelationships of organisms within the ecosystem
Content
Module 3: Biological Diversity
Adaptations
Students conduct practical investigations individually or in teams, or use secondary sources to examine the adaptations of organisms that increase their ability to survive in their environment, including:
- structural adaptations
- physiological adaptations
- behavioural adaptations
Module 4: Ecosystem Dynamics
Population dynamics
Students investigate and determine relationships between biotic and abiotic factors in an ecosystem, including:
- the impact of abiotic factors
- the impact of biotic factors, including predation, competition and symbiotic relationships
- the ecological niches occupied by species
- predicting consequences for populations in ecosystems due to predation, competition, symbiosis and disease
- measuring populations of organisms using sampling techniques
Past ecosystems
Students analyse palaeontological and geological evidence that can be used to provide evidence for past changes in ecosystems, including but not limited to:
- Aboriginal rock engravings, middens
Future ecosystems
Students investigate changes in past ecosystems that may inform our approach to the management of future ecosystems, including:
- the role of human-induced selection pressures on the extinction of species
- the role of changing climate on ecosystems
Supporting resources and virtual fieldwork
| Mangrove resource hub |
Supports the fieldwork program and includes pre-visit activities, teacher programming outline and resources. This resource will support schools/students wanting to complete this as a depth study. Please contact the Centre for more information. |
| Teacher resource | Teacher programming guide |
| Mangrove virtual fieldwork |
An online resource to support students who are unable to attend the fieldwork. Please contact the Centre for more information. |
Cost and details
| Bus access map |
Map for access to venue will be sent with the confirmation. Please ensure you print a copy and provide to the bus driver on the morning of the excursion. |
| Cost |
2026 DoE $24 per student - GST free 2026 Non-gov school cost $30 per student - GST free, minimum charge $750 per class NOTE: National Parks entry is $1.10 per student in addition - GSR |
| Class numbers and size |
Up to 4 classes Max. 30 students per class Please contact the centre if you have more than 4 classes. |
| Risk assessments | A complete risk assessment will be sent upon confirmation. |
| What to bring |
Backpack, medication, low-waste food, water bottle, sunblock, raincoat, hat, sturdy shoes, mask. Students wear sports uniform. |
| Adverse weather |
On days where the weather is unsuitable (see risk assessment), a Gibberagong staff member will contact the organising teacher to discuss alternative arrangements. Please check your bus company’s cancellation policy. |
| Medical notifications | Notify Gibberagong EEC by completing and returning the medical form before the excursion. This form will be sent out upon confirmation of booking. |